<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Insert title here</title>
	<style type="text/css">
		
		img:after{
			content:attr(alt);
			display:block;
			text-align:center;
			margin-top:5px;
		}
	
	</style>
</head>
<body>
	<p><img src="bill2.jpg" alt="Sky"/></p>
</body>
</html>

<!-- doesn't work -->